CN105936197B - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
- Publication number
- CN105936197B CN105936197B CN201610118025.0A CN201610118025A CN105936197B CN 105936197 B CN105936197 B CN 105936197B CN 201610118025 A CN201610118025 A CN 201610118025A CN 105936197 B CN105936197 B CN 105936197B
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- Prior art keywords
- central
- tire
- land portion
- main groove
- groove
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/11—Tread patterns in which the raised area of the pattern consists only of isolated elements, e.g. blocks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/04—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
Abstract
The present invention provides a kind of pneumatic tire (1), can well-balanced improve resistance to uneven wear performance and wetland performance, is formed with central land portion (5) and a pair of intermediate land portion (6,6).The a plurality of central transverse (10) that a pair of of central main groove (3,3) connection is got up is provided in central land portion (5).The a plurality of intermediate cutter groove (12) for being connected to central main groove (3) with shoulder main groove (4) is provided in intermediate land portion (6).Under the unfolded state of fetus face (2), at least part of each intermediate cutter groove (12) makes central transverse (10) be projected on extension in the region on intermediate land portion (6) along tire axial.
Description
Technical field
The present invention relates to the pneumatic tires for balancedly improving resistance to uneven wear performance and wetland performance.
Background technique
There is known the inflated wheels of the traverse furrow of tap drain and crosscutting above-mentioned land portion that division land portion is provided in fetus face
Tire.For above-mentioned pneumatic tire, the moisture film of land subordinate is discharged via traverse furrow to tap drain, therefore has good wetland
Performance.In order to further increase wetland performance, the ditch volume for for example increasing traverse furrow is proposed.
However, above-mentioned pneumatic tire reduces there are the rigidity in the land portion of fetus face and reduces resistance to uneven wear performance
The problem of.
Patent document 1: Japanese Unexamined Patent Publication 06-239109 bulletin
Summary of the invention
The present invention is proposed in view of above actual conditions, and the main one kind that is designed to provide is to improve center
Traverse furrow and intermediate cutter groove be basic, the balancedly pneumatic tire of raising resistance to uneven wear performance and wetland performance.
The present invention is a kind of pneumatic tire, is provided with that the two lateral edge tires in tire equator are circumferentially continuous to be prolonged in fetus face
A pair of of central main groove for stretching and outside the tire axial of above-mentioned central main groove the circumferentially continuous extension of lateral edge tire a pair of of tire shoulder
Tap drain, to be formed with the central land portion divided by a pair of above-mentioned central main groove and by above-mentioned central main groove and above-mentioned tire shoulder
A pair intermediate land portion that tap drain divides, the pneumatic tire are characterized in that being provided in above-mentioned central land portion will be in a pair
The a plurality of central transverse that central main groove connection is got up is stated, is provided in above-mentioned intermediate land portion by above-mentioned central main groove and above-mentioned tire
The a plurality of intermediate cutter groove that the connection of shoulder tap drain is got up, under the unfolded state of above-mentioned fetus face, at least the one of above-mentioned each intermediate cutter groove
Part extends in the region for being projected on above-mentioned central transverse in above-mentioned intermediate land portion along tire axial.
The preferably above-mentioned fetus face of pneumatic tire of the invention is formed with a pair divided by above-mentioned shoulder main groove and tyre surface end
Tire-shoulder land portion, above-mentioned tire-shoulder land portion are the flat flanks for being not provided with ditch or cutter groove.
The preferably above-mentioned central transverse of pneumatic tire of the invention is serrated extension.
Pneumatic tire of the invention is preferably provided in above-mentioned central land portion from above-mentioned central main groove towards tire equator
The central cutter groove that side extends and terminates in above-mentioned central land portion.
Pneumatic tire of the invention links the both ends of above-mentioned central transverse preferably under the unfolded state of above-mentioned fetus face
Straight line is tilted to first direction, and above-mentioned each central cutter groove is tilted to the second direction opposite with above-mentioned first direction.
The preferably above-mentioned central transverse of pneumatic tire of the invention include to the inclined both ends of above-mentioned second direction and upwards
State the inclined central portion of first direction.
The preferably above-mentioned central transverse of pneumatic tire of the invention is circumferentially arranged alternately with above-mentioned central cutter groove along tire.
The tire axial length of the preferably above-mentioned central cutter groove of pneumatic tire of the invention is the tire in above-mentioned central land portion
The 15%~30% of axial width.
The depth of the preferably above-mentioned central cutter groove of pneumatic tire of the invention be the ditch depth of above-mentioned central main groove 30%~
50%.
Pneumatic tire of the invention is preferably provided with from above-mentioned central main groove in above-mentioned intermediate land portion to outside tire axial
The intermediate band ditch that side extends and terminates in above-mentioned intermediate land portion, for adjacent among the above across above-mentioned central main groove
For entreating cutter groove and above-mentioned intermediate band ditch, above-mentioned central cutter groove and above-mentioned intermediate band ditch at above-mentioned central main groove
Tire circumferential distance between open end is smaller than the tire circumferential lengths of above-mentioned central cutter groove.
Pneumatic tire of the invention preferably above-mentioned intermediate cutter groove includes from above-mentioned central main groove to tire axial outside in straight
Threadiness extends and connects smoothly relative to the inclined first part of tire axial and with above-mentioned first part and be in circle
The second part that arcuation extends.
Pneumatic tire of the invention is formed with central land portion and a pair of intermediate land portion, which is provided with
The a plurality of central transverse that the connection of a pair of of central main groove is got up, a pair of centre land portion are provided with central main groove and tire shoulder master
The a plurality of intermediate cutter groove that ditch connection is got up.In this way, central transverse and the crosscutting each land portion of intermediate cutter groove.Thereby, it is possible to will be each
The moisture film of land subordinate is swimmingly discharged from two tap drains via central transverse and intermediate cutter groove.In addition, in turning, usually
Effect has the intermediate land portion of biggish cross force to be provided with the width cutter groove smaller than traverse furrow, so as to remain intermediate higher
The rigidity in land portion, therefore resistance to uneven wear performance improves.In addition, the width traverse furrow bigger than cutter groove is set to central land
Portion, therefore the moisture film in central land portion can be effectively discharged to central main groove, therefore wetland performance can be maintained higher.
At least part of each intermediate cutter groove throws central transverse along tire axial under the unfolded state of fetus face
Shadow extends in the region in intermediate land portion.As a result, in the above-mentioned zone in central land portion and intermediate land portion, decorative pattern
Rigidity is effectively reduced, so that the joint open of intermediate cutter groove and central transverse increases, therefore can be further in ground connection
It is effectively discharged out the moisture film in central land portion and intermediate land portion.Therefore, wetland performance further increases.
As described above, pneumatic tire of the invention be provided with crosscutting central land portion central transverse and crosscutting centre
The intermediate cutter groove in land portion, at least part of the intermediate cutter groove make central land portion edge under the unfolded state of fetus face
Tire axial be projected in the region in intermediate land portion extend, therefore can balancedly improve resistance to uneven wear performance with
Wetland performance.
Detailed description of the invention
Fig. 1 is the expanded view for indicating the fetus face of one embodiment of the present invention.
Fig. 2 is the central land portion of Fig. 1 and the enlarged drawing in intermediate land portion.
Fig. 3 is the expanded view for indicating the fetus face of other embodiments of the invention.
Fig. 4 is the expanded view of the fetus face of comparative example.
Symbol description
1 ... pneumatic tire；2 ... fetus faces；3 ... central main grooves；4 ... shoulder main grooves；5 ... central land portions；6 ... intermediate lands
Ground portion；10 ... central transverses；12 ... intermediate cutter grooves.
Specific embodiment
Hereinafter, being illustrated based on attached drawing to one embodiment of the present invention.
Fig. 1 shows the expanded view for indicating the fetus face 2 of pneumatic tire 1 of one embodiment of the present invention.This embodiment party
The pneumatic tire of formula is (hereinafter, the case where having referred to as " tire ".) 1 for example other than passenger car tire, it is also suitable for sharp
With for high-capacity tyres such as truck, buses.
As shown in Figure 1, be provided with a pair that the two lateral edge tires in tire equator C extend in fetus face 2 circumferentially continuously
Central main groove 3,3 and lateral edge tire extends circumferentially continuously outside the tire axial of central main groove 3 a pair of of shoulder main groove 4,
4。
The central main groove 3 and shoulder main groove 4 of present embodiment are for example linearly to be extended.Above-mentioned two tap drains 3,4 energy
It is enough that water in ditch is swimmingly discharged to the rear of tire direction of rotation, therefore improve wetland performance.In addition, the shape of tap drain 3,4
Shape is not limited to linearly, for example, it is also possible to be serrated or wavy.
In order to improve the decorative pattern rigidity and wetland performance, central main groove 3 and tire in the land portion being formed between each tap drain
The furrow width W1 of shoulder tap drain 4 is for example preferably 3%~9% or so of tread width TW.From the viewpoint of identical, central main groove 3
And the ditch depth (illustration omitted) of shoulder main groove 4 is for example preferably 13.5~18.5mm or so.
Above-mentioned " tread width " TW refers to the distance of the tire axial between tyre surface end Te, Te.Tyre surface end Te is defined as
Regular load is loaded to the tire 1 for uncharging normal state that wheel rim is assembled into regular wheel rim and is filled with regular internal pressure, and
With 0 be outside one's consideration inclination angle be grounded on plane when fetus face 2 the outermost earthing position of tire axial.In the feelings of no special instructions
Under condition, the size etc. in each portion of tire is the value measured under above-mentioned normal state.
" regular wheel rim " refers in the schematism including specification based on tire, advises for each tire
The wheel rim of the fixed specification, such as be then " standard rim " if JATMA, it is then " Design Rim " if TRA, if
ETRTO is then " Measuring Rim ".
" regular internal pressure " refers in the schematism including specification based on tire, advises for each tire
The air pressure of fixed each specification is then " highest air pressure " if JATMA, is then table " TIRE LOAD LIMITS AT if TRA
Maximum value documented by VARIOUS COLD INFLATION PRESSURES " is then " INFLATION if ETRTO
PRESSURE”。
" regular load " refers in the schematism including specification based on tire, advises for each tire
The load of fixed each specification is then " maximum loadability " if JATMA, is then table " TIRE LOAD LIMITS if TRA
Maximum value documented by AT VARIOUS COLD INFLATION PRESSURES " is then " LOAD if ETRTO
CAPACITY”。
Using above-mentioned tap drain 3,4, fetus face 2 be provided with a central land portion 5, a pair of intermediate land portion 6,6 with
And a pair of of tire-shoulder land portion 7,7.
Central land portion 5 is formed between a pair of of central main groove 3,3.
A plurality of central transverse 10 and central cutter groove 11 are respectively arranged in central land portion 5.In addition, in the present specification,
" traverse furrow " is defined as the incision-like that furrow width is 1mm or more.In addition, " cutter groove " is defined as the incision-like of short of width 1mm.
Central transverse 10 gets up connection between a pair of of central main groove 3,3.Above-mentioned central transverse 10 can be by central land
Moisture film under ground portion 5 is swimmingly discharged to the central main groove 3,3 of two sides.
The extension as shown in Fig. 2, central transverse 10 is serrated.For above-mentioned central transverse 10, central transverse 10
Total length it is bigger than the tire axial width Wc in central land portion 5, therefore water that can effectively under aggregation central land portion 5
Film.
In the present specification, it defines relative to tire axial and towards the inclined first direction in side and same first direction
Reversed second direction.First direction is that the straight line of both ends 10e, 10e of connection central transverse 10 (are indicated) 10c by imaginary line
Towards (in Fig. 2, being tilted to left down from upper right).Second direction is, i.e. from upper left to the right under inclined court reversed with straight line 10c
To.Moreover, central transverse 10 is to 3 side of central main groove and to the end 14 of the inclined two sides of second direction and being held on two
It the end 14 of side and is constituted to the inclined central portion 15 of first direction.Above-mentioned central transverse 10 has biggish total length,
Also, the quantity at the top 18 that the end 14 for reducing two sides intersects with central portion 15 is able to suppress the rigidity drop in central land portion 5
It is low.Thereby, it is possible to maintain wetland performance and resistance to uneven wear performance higher.Top 18 is in the present embodiment in each center
Traverse furrow 10 is provided at two.Above-mentioned " total length " is the length along the long side of central transverse 10.
In order to effectively play above-mentioned effect, the end 14 of two sides is preferably 10~40 relative to the angle, θ 1 of tire axial
Degree.In the case where the above-mentioned angle, θ 1 of the end 14 of two sides is more than 40 degree, there are the tire axial outside portions in central land portion 5
The worry that the tire axial divided is rigidly greatly reduced.
In order to maintain higher central land portion 5 tire axial two side portions rigid balancing, tire axial side
The above-mentioned angle, θ 1a of end 14e is preferably identical as the above-mentioned angle, θ 1b of the end 14i of the tire axial other side.
The length L1 of the tire axial of the end 14 of two sides is preferably the 15% of the tire axial width Wc in central land portion 5
~35%, more preferably the 20%~30% of the tire axial width Wc in central land portion 5.Two sides end 14 it is above-mentioned
In the lesser situation of length L1, above-mentioned top 18 is formed in 3 side of central main groove in central land portion 5, therefore central land portion 5
Decorative pattern is rigidly greatly reduced.In the biggish situation of length L1 of the end 14 of two sides, top 18 is close to tire axial each other,
Therefore there is the worry that the tire rigid circumference near top 18 is greatly reduced.
The above-mentioned length L1a of the end 14e of tire axial side is preferably the above-mentioned of the end 14i of the tire axial other side
The 90%~110% of length L1b.Thereby, it is possible to maintain the rigidity of the tire axial two side portions in central land portion 5 flat higher
Weighing apparatus, so as to maintain resistance to uneven wear performance higher.
In order to effectively play above-mentioned effect, the length L2 of the tire axial of central portion 15 is preferably central land portion 5
Above-mentioned width Wc 40%~60%.
For the furrow width W2 (shown in Fig. 1) of central transverse 10, in order to improve the decorative pattern rigidity in central land portion 5, and mention
High drainage performance, preferably 1~3mm.
Central cutter groove 11 is to extend from central main groove 3 towards tire axial outside and terminate in central land portion 5
Semi open model cutter groove.Above-mentioned central cutter groove 11 is effectively reduced the decorative pattern rigidity in central land portion 5, to promote central transverse
10 opening, and then more moisture films under central land portion 5 can be made in 10 aggregation of central transverse.In addition, central cutter groove 11
Edge effect can be played relative to wetland road surface.Therefore, central cutter groove 11 plays superior wetland performance.
The central cutter groove 11 of present embodiment is tilted to above-mentioned second direction.That is, above-mentioned straight line 10c is formed as and first party
It is reversed to inclined central transverse 10 and central cutter groove 11.The whole marginal element of central transverse 10 and center are acted on as a result,
The marginal element of cutter groove 11 generates reversed cross force, thus it is arbitrary to the left and right towards turned can also play it is biggish
Edge effect, to improve wetland performance.
Central cutter groove 11 is to identical with the end 14 of two sides towards inclination.Thereby, it is possible to inhibit the wheel in central land portion 5
The excessive reduction of the decorative pattern rigidity of tire axial sides part.From the viewpoint of above-mentioned, central cutter groove 11 is relative to tire axis
To angle, θ 2 be preferably 10~40 degree, it is further preferably identical as the angle, θ 1 of end 14 of two sides.
Central cutter groove 11 is circumferentially alternately arranged with central transverse 10 along tire.Thereby, it is possible to further suppress central land
The reduction of the decorative pattern rigidity of the tire axial two side portions in ground portion 5, so that resistance to uneven wear performance further increases.From above-mentioned
From the viewpoint of, central cutter groove 11 is preferably disposed on substantially intermediate between adjacent central transverse 10,10 in tire circumferential direction
Position.
The tire axial length L3 of central cutter groove 11 be preferably the tire axial width Wc in central land portion 5 15%~
30%.In the case where the 15% of the width Wc in the above-mentioned length L3 deficiency central land portion 5 of central cutter groove 11, then it can not increase
The joint open of central transverse 10.In addition, central 11 bring edge effect of cutter groove becomes smaller.Accordingly, there exist can not improve wetland
The worry of energy.In the case where the above-mentioned length L3 of central cutter groove 11 is more than the 30% of the width Wc in central land portion 5, exist
Entreating the decorative pattern in land portion 5 rigidly reduces, thus the worry that resistance to uneven wear performance deteriorates.In addition, in order to further significantly
The decorative pattern rigidity of the tire axial exterior portion in central land portion 5 is maintained, the above-mentioned length L3 of central cutter groove 11 is preferably center
The 90%~110% of the length L1 of the end 14 of the two sides of traverse furrow 10.
From the viewpoint of identical, the depth (illustration omitted) of central cutter groove 11 is preferably the ditch depth of central main groove 3
30%~50%, more preferably 35%~45%.
Intermediate land portion 6 is formed between central main groove 3 and shoulder main groove 4.
Intermediate land portion 6 is provided with a plurality of intermediate cutter groove 12 and intermediate band ditch 13.
Central main groove 3 is connected to by intermediate cutter groove 12 with shoulder main groove 4.Above-mentioned intermediate cutter groove 12 plays biggish side
Edge effect, to improve wetland performance.In addition, thering is the intermediate land portion 6 of biggish cross force to set in usually effect in turning
The width cutter groove smaller than traverse furrow is set, therefore the rigidity in intermediate land portion 6 can be maintained higher.
As shown in Figure 1, at least part of intermediate cutter groove 12 makes central transverse 10 be projected on centre along tire axial
Extend in region Sa in land portion 6.As a result, in the region Sa in central land portion 5 and intermediate land portion 6, effectively drop
Low decorative pattern rigidity, so that the joint open of intermediate cutter groove 12 and central transverse 10 increases, therefore can further have in ground connection
The moisture film in effect ground discharge central land portion 5, intermediate land portion 6.Therefore, wetland performance further increases.As above, in the present invention
In, make 12 co-operating of central transverse 10 and intermediate cutter groove, so that the decorative pattern in central land portion 5 will not be made rigidly to be greatly reduced,
And then it is effectively reduced central land portion 5 and the decorative pattern rigidity in intermediate land portion 6 in region Sa.Therefore, two lands are able to maintain that
The resistance to uneven wear performance in ground portion 5,6, and it is discharged the moisture film in the central land portion 5 for being difficult to be discharged swimmingly,
To improve wetland performance.
In addition, for example, in the case where tire 1 is used as driving wheel, the profile etc. based on fetus face 2, in general, central
Land portion 5 compares compared to intermediate land portion 6 and has acted on biggish earth contact pressure, therefore is easy to produce uneven wear.However, this
The tire 1 of embodiment is able to suppress being greatly reduced for the decorative pattern rigidity in central land portion 5, so even being used as in tire 1
In the case where driving wheel, it is also able to suppress the generation of uneven wear.
In the present embodiment, a part of the intermediate cutter groove 12 in the intermediate land portion 6,6 of two sides is horizontal by a center
Ditch 10 is projected on the extension of the region Sa in the intermediate land portion 6,6 of two sides.Thereby, it is possible to effectively further reduce central land
The decorative pattern rigidity of the region Sa in the intermediate land portion 6,6 of portion 5 and two sides, therefore central land can effectively further be discharged
The moisture film in portion 5, intermediate land portion 6.
In order to effectively play above-mentioned effect, in the tire circumferential lengths Lt for the intermediate cutter groove 12 that above-mentioned zone Sa extends
45% or more of the tire circumferential lengths La of preferably region Sa, more preferably 60% or more.
As shown in Fig. 2, intermediate cutter groove 12 includes that outside extends and relative to tire axial from central main groove 3 to tire axial
Inclination and the first part 16 linearly extended and the second part extended in circular arc 17.The intermediate knife of present embodiment
Slot 12 includes first part 16 and second part 17.
First part 16 is preferably 10~40 degree relative to the angle, θ 3 of tire axial.Above-mentioned first part 16 is along tire
Axial direction and tire circumferentially play edge effect, and the decorative pattern rigidity for being able to suppress intermediate land portion 6 is greatly reduced.
Second part 17 is connected smoothly with first part 16.Thereby, it is possible to improve the decorative pattern in intermediate land portion 6 rigidity,
And the water energy in intermediate cutter groove 12 enough swimmingly flows, therefore wetland performance is balancedly improved with resistance to uneven wear performance.
" connecting smoothly " refer to as shown, first part 16 and the not set vertex of interconnecting piece of second part 17 form.
The second part 17 of present embodiment is towards on the outside of tire axial and decrescence relative to the angle, θ of tire axial 4.On
The second part 17 stated in turning driving can higher maintenance effect have biggish cross force intermediate land portion 6 tire axis
The tire axial rigidity of outside side section, therefore improve resistance to uneven wear performance.
Second part 17 is tilted preferably with respect to tire axial towards side.In further significantly maintaining
Between land portion 6 second part 17 near decorative pattern rigidity.
From central main groove 3 to tire axial, outside extends and terminates in intermediate land portion 6 middle transverse groove 13.Above-mentioned
The moisture film in intermediate land portion 6 can be discharged to 3 side of central main groove for middle transverse groove 13.In addition, middle transverse groove 13 not with tire shoulder master
Ditch 4 is connected to, therefore raising effect has the decorative pattern rigidity on the outside of the tire axial in the intermediate land portion 6 of biggish cross force.
For the middle transverse groove 13 and central cutter groove 11 adjacent across central main groove 3, preferably intermediate band ditch
13 and central cutter groove 11 central main groove 3 at open end 13e, 11e tire circumferential distance Lb than central cutter groove 11 wheel
Tire circumferential lengths L4 is small.Central cutter groove 11 and middle transverse groove 13 be as a result, with ground connection of closer moment, thus central cutter groove 11 and
The joint open of middle transverse groove 13 increases, to be further able to improve wetland performance.
As shown in Figure 1, in the present embodiment, in the expanded view of fetus face 2, middle transverse groove 13 does not make central cutter groove
Extend in the 11 region Sb being projected in intermediate land portion 6 along tire axial.Thereby, it is possible to inhibit central land portion 5 and
The excessive reduction of the decorative pattern rigidity in intermediate land portion 6, so as to maintain resistance to uneven wear performance.In addition, middle transverse groove
13 are not limited to above-mentioned mode with the equipping position of central cutter groove 11.
Middle transverse groove 13 linearly extends and tilts relative to tire axial.Above-mentioned middle transverse groove 13 and central knife
Slot 11 circumferentially plays edge effect in tire axial and tire in the same manner, and is smoothly discharged the water in ditch.
As shown in Fig. 2, middle transverse groove 13 is to identical with first part 16 towards inclination.Above-mentioned middle transverse groove 13 is higher
Ground maintains the tire rigid circumference in the intermediate land portion 6 near central main groove 3.From the viewpoint of above-mentioned, 13 phase of middle transverse groove
Angle, θ 5 for tire axial is preferably 10~40 degree.Middle transverse groove 13 more preferably has the angle, θ 3 with first part 16
Identical direction.
Although the length L5 of the tire axial of middle transverse groove 13 is preferably intermediate land portion 6 without particularly limiting
Tire axial width Wm 20%~35%.
For the furrow width W3 (shown in Fig. 1) of middle transverse groove 13, in order to well-balanced improve wetland performance and resistance to uneven
Polishing machine is preferably 1~3mm.From the viewpoint of identical, the ditch depth (illustration omitted) of middle transverse groove 13 is preferably center
The 30%~50% of the ditch depth of tap drain 3.
As shown in Figure 1, tire-shoulder land portion 7 is formed between shoulder main groove 4 and tyre surface end Te.In the present embodiment, tire
Shoulder land portion 7 is the flat flank for being not provided with ditch, cutter groove.Tire-shoulder land portion 7 has biggish decorative pattern rigidity as a result,.Therefore,
For example, in the case where tire 1 is used as the driven wheel for not acting on biggish load compared with driving wheel, generally, based on tire
The profile etc. of face 2, tire-shoulder land portion 7 is easy to produce sliding compared with the intermediate land portion 6 on the inside of tire axial, therefore is easy
Generate uneven wear.However, as in the present embodiment, tire-shoulder land portion 7 is formed as flat flank, even if thus in quilt
In the case where as driven wheel, it is also able to suppress the sliding in tire-shoulder land portion 7, so as to inhibit the generation of uneven wear.
In addition, so-called flat flank also include be provided with not on resistance to uneven wear performance give influence ditch of the depth less than 1.5mm,
The rib body of cutter groove.In addition, tire-shoulder land portion 7 is set to the outermost of the tire axial of fetus face 2, therefore tire-shoulder land portion 7
Moisture film be easy be discharged from tyre surface end Te.Therefore, it even if tire-shoulder land portion 7 is formed as flat flank, is also able to suppress wet
The reduction of ground performance.
As above, in the fetus face of present embodiment 2, even if the case where tire 1 is used as driving wheel or driven wheel
Under, it is also able to suppress the uneven wear in central land portion 5 and the generation of tire-shoulder land portion 7, and can play superior
Drainage performance.In addition, present embodiment fetus face 2 be not provided with furrow width be 1mm or more ditch, therefore can further compared with
Highland maintains decorative pattern rigidity.Therefore, pneumatic tire 1 of the invention can well-balanced improve resistance to uneven wear performance with it is wet
Ground performance.
More than, pneumatic tire of the invention is illustrated in detail, but the present invention is not limited to above-mentioned specific
Embodiment can be altered to various modes certainly to be implemented.
[embodiment]
Specification based on table 1 and be tested fixture have Fig. 1 motif size 11R22.5 tire, and to it is each for examination
The resistance to uneven wear performance and wetland performance of tire are tested.Respectively such as the common specification of examination tire, test method
Under.
Tread width TW:235mm
The ditch depth of each tap drain: 17.7mm
The ditch depth of central transverse: 2.0mm
The furrow width of intermediate band ditch: 2.0mm
The ditch depth of intermediate band ditch: 2.0mm
The furrow width and ditch depth of the traverse furrow in the tire-shoulder land portion of Fig. 4: identical as the furrow width of middle transverse groove and ditch depth
La: central transverse is made to be projected on the tire circumferential lengths in the region in intermediate land portion along tire axial
Lt: the tire circumferential lengths of the intermediate cutter groove in above-mentioned zone
Lb: the open end at the central main groove of central cutter groove and the wheel between the open end at the central main groove of middle transverse groove
Tire circumferential distance
Test method is as follows.
< resistance to uneven wear performance >
The full wheel that condition is installed on 10 tons of load-carrying of 2-D vehicle is stated below each test tire, test driver makes above-mentioned vehicle
30000km is travelled in the test route of dried asphalt road.Then, each tap drain to the central main groove and shoulder main groove taken turns entirely
The differences of abrasion loss of costa colpi of two sides be measured.Measurement for each tap drain along tire circumferential substantially equidistant eight into
Row.As a result it is indicated with the average value of the difference of whole measured values.Numerical value is the smaller the better.
Wheel rim (full wheel): 7.50 × 22.5
Internal pressure (full wheel): the 100% of regular internal pressure
Load: the 100% of regular load
< wetland performance >
Test driver makes above-mentioned vehicle in the test route row of the wetland bituminous pavement of the puddles of water provided with depth of water 5mm
It sails.Then, by the sense organ of test driver to steering wheel responsiveness at this time, curving, traction property and with adherence properties etc.
Related ride characteristic is evaluated.As a result it is indicated with the scoring that embodiment 1 is 100.Numerical value is the bigger the better.10 points of numerical value
Difference indicates there is the case where significant performance change therebetween, and the expression of 5 point differences has apparent performance therebetween and becomes
The case where change.3 points of differences below are to be difficult to the difference for the degree for causing co-driver to pay attention to.
The result of test is shown in table 1.
[table 1]
The result of test is able to confirm that the tire of embodiment can be improved well-balanced compared with the tire of comparative example
Resistance to uneven wear performance and wetland performance.In addition, having changed tire size and being tested, with the test result phase
Together.
Claims (9)
1. a kind of pneumatic tire is provided with a pair in the two circumferentially continuous extensions of lateral edge tire of tire equator in fetus face
Central main groove；And outside the tire axial of the central main groove the circumferentially continuous extension of lateral edge tire a pair of of shoulder main groove, from
And it is formed with the central land portion divided by a pair of central main groove and is drawn by the central main groove and the shoulder main groove
A pair intermediate land portion divided,
The pneumatic tire is characterized in that,
The a plurality of central transverse that a pair of central main groove connection is got up is provided in the central land portion,
The a plurality of intermediate cutter groove that the central main groove and shoulder main groove connection are got up is provided in the intermediate land portion,
Under the unfolded state of the fetus face, at least part of each intermediate cutter groove make the central transverse along wheel
Tire axis projection extends in the region in the intermediate land portion,
The central transverse is serrated extension,
The central land portion is provided with the two sides from the central main groove from tire equator to extend simultaneously towards tire equator side
And the central cutter groove terminated in the central land portion.
2. pneumatic tire according to claim 1, which is characterized in that
The fetus face is formed with a pair of of the tire-shoulder land portion divided by the shoulder main groove and tyre surface end,
The tire-shoulder land portion is the flat flank for being not provided with ditch or cutter groove.
3. pneumatic tire according to claim 1, which is characterized in that
Under the unfolded state of the fetus face,
The straight line for linking the both ends of the central transverse is tilted to first direction,
Each central cutter groove is tilted to the reversed second direction of the first direction.
4. pneumatic tire according to claim 3, which is characterized in that
The central transverse includes to the inclined both ends of the second direction and to the inclined central portion of the first direction.
5. pneumatic tire according to any one of claim 1 to 4, which is characterized in that
The central transverse is circumferentially arranged alternately with the central cutter groove along tire.
6. pneumatic tire according to any one of claim 1 to 4, which is characterized in that
The tire axial length of the center cutter groove is the 15% to 30% of the tire axial width in the central land portion.
7. pneumatic tire according to any one of claim 1 to 4, which is characterized in that
The depth of the center cutter groove is the 30% to 50% of the ditch depth of the central main groove.
8. pneumatic tire according to any one of claim 1 to 4, which is characterized in that
It is provided with from the central main groove on the outside of tire axial and extends and on the intermediate land in the intermediate land portion
The intermediate band ditch terminated in portion,
For the central cutter groove of adjoining and the intermediate band ditch across the central main groove, the central cutter groove and
The tire of the tire circumferential distance between open end at the central main groove of the intermediate band ditch than the central cutter groove
Circumferential lengths are small.
9. pneumatic tire according to any one of claim 1 to 4, which is characterized in that
The intermediate cutter groove includes first part and second part, and the first part is from the central main groove to outside tire axial
Side linearly extends and tilts relative to tire axial, the second part and the first part connect smoothly and
It extends in circular arc.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015042893A JP6393216B2 (en) | 2015-03-04 | 2015-03-04 | Pneumatic tire |
| JP2015-042893 | 2015-03-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105936197A CN105936197A (en) | 2016-09-14 |
| CN105936197B true CN105936197B (en) | 2019-06-07 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610118025.0A Active CN105936197B (en) | 2015-03-04 | 2016-03-02 | Pneumatic tire |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6393216B2 (en) |
| CN (1) | CN105936197B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6828387B2 (en) * | 2016-11-14 | 2021-02-10 | 住友ゴム工業株式会社 | tire |
| JP6848510B2 (en) * | 2017-02-20 | 2021-03-24 | 住友ゴム工業株式会社 | Pneumatic tires for heavy loads |
| JP6762267B2 (en) * | 2017-06-07 | 2020-09-30 | 株式会社ブリヂストン | tire |
| US11167596B2 (en) | 2017-11-27 | 2021-11-09 | Sumitomo Rubber Industries, Ltd. | Tire |
| EP3489036B1 (en) | 2017-11-27 | 2020-05-20 | Sumitomo Rubber Industries Ltd. | Tyre |
| CN110422015B (en) * | 2018-05-01 | 2022-10-11 | 住友橡胶工业株式会社 | Tyre for vehicle wheels |
| JP7143717B2 (en) * | 2018-10-12 | 2022-09-29 | 住友ゴム工業株式会社 | tire |
| JP7298381B2 (en) * | 2019-08-08 | 2023-06-27 | 横浜ゴム株式会社 | pneumatic tire |
| JP7415142B2 (en) * | 2019-11-25 | 2024-01-17 | 横浜ゴム株式会社 | pneumatic tires |
| JP2022056618A (en) * | 2020-09-30 | 2022-04-11 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tire |
| JP2022126526A (en) * | 2021-02-18 | 2022-08-30 | 横浜ゴム株式会社 | tire |
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|---|---|---|---|---|
| JP2005297880A (en) * | 2004-04-15 | 2005-10-27 | Bridgestone Corp | Pneumatic tire |
| CN1990283A (en) * | 2005-12-29 | 2007-07-04 | 住友橡胶工业株式会社 | Heavy-duty tire |
| WO2012005187A1 (en) * | 2010-07-07 | 2012-01-12 | 住友ゴム工業株式会社 | Pneumatic tire |
| WO2012043668A1 (en) * | 2010-09-29 | 2012-04-05 | 株式会社ブリヂストン | Heavy-load pneumatic tire |
| JP2012183885A (en) * | 2011-03-04 | 2012-09-27 | Bridgestone Corp | Tire |
| CN103832221A (en) * | 2012-11-20 | 2014-06-04 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN104097461A (en) * | 2013-04-12 | 2014-10-15 | 住友橡胶工业株式会社 | Pneumatic tire |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6138536B2 (en) * | 2013-03-19 | 2017-05-31 | 株式会社ブリヂストン | Pneumatic tire |
| JP5715655B2 (en) * | 2013-03-22 | 2015-05-13 | 住友ゴム工業株式会社 | Pneumatic tire |
-
2015
- 2015-03-04 JP JP2015042893A patent/JP6393216B2/en active Active
-
2016
- 2016-03-02 CN CN201610118025.0A patent/CN105936197B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005297880A (en) * | 2004-04-15 | 2005-10-27 | Bridgestone Corp | Pneumatic tire |
| CN1990283A (en) * | 2005-12-29 | 2007-07-04 | 住友橡胶工业株式会社 | Heavy-duty tire |
| WO2012005187A1 (en) * | 2010-07-07 | 2012-01-12 | 住友ゴム工業株式会社 | Pneumatic tire |
| WO2012043668A1 (en) * | 2010-09-29 | 2012-04-05 | 株式会社ブリヂストン | Heavy-load pneumatic tire |
| JP2012183885A (en) * | 2011-03-04 | 2012-09-27 | Bridgestone Corp | Tire |
| CN103832221A (en) * | 2012-11-20 | 2014-06-04 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN104097461A (en) * | 2013-04-12 | 2014-10-15 | 住友橡胶工业株式会社 | Pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6393216B2 (en) | 2018-09-19 |
| CN105936197A (en) | 2016-09-14 |
| JP2016159861A (en) | 2016-09-05 |
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